Review on the stochastic nature of photovoltaic generation and its impact on the energy systems: Why it matters

As the share of photovoltaic (PV) generation is growing worldwide, so is the concerns about its stochastic nature that can complicate the operation and planning of energy systems. With this paper we give an overview on the topic, analyzing and quantifying the stochasticity of PV and its impact on energy systems, with a main focus on the generation sector. The impact is analyzed in terms of ability to replace conventional generation, required operating reserves, and requirements of related storage systems. The work is a literature review detecting concerning matters, interesting methods to quantify the problem, interesting results and open matters. The paper may be interesting for system operators, policy makers, researchers and producers.